# Compared to most other substances, a great deal of heat is needed to raise the temperature of by a given amount. What trait of water allows this to take place?

Aug 27, 2017

Well, for a start, water is extraordinarily dense.........

#### Explanation:

We know that the density of water under standard conditions is $\rho = 1.0 \cdot g \cdot m {L}^{-} 1$; and thus for a given volume, there is a LARGE number of $H - O$ bonds to heat.....

Why should water be so dense? Well, we can probably attribute this to hydrogen bonding, inasmuch there is a great deal of intermolecular interaction between the polar $\stackrel{\delta +}{H} - \stackrel{\delta -}{O}$ bonds...

$H - O - \stackrel{\delta +}{H} \cdots \stackrel{\delta -}{O} {H}_{2} \cdots \stackrel{\delta -}{O}$

Molecules of comparable size, are not so dense, and are in fact room temperature gases, consider $N {H}_{3}$, and ${H}_{2} S$.